Pipe Fitter Interview Questions & Answers

Are you a graduate? Searching for a better job? Are you blessed with the knowledge of technical skills? Are you interested to work in the industrial sector? Then log on to www.wisdomjobs.com. Pipe fitter is a tradesperson who installs, assembles, fabricates, maintains and repairs mechanical piping systems. Pipe fitters usually begin as helpers or apprentices. Journeyman pipefitters deal with industrial or commercial marine piping and cooling systems. A pipefitter attaches to the walls, structures, and fixtures such as radiators or tanks using brackets, clamps, tools or welding equipment. As the industrial sector needs high demand of employees with technical skills, you have a wide scope in this field. So, grab the opportunity by looking into the pipefitter job interview questions and answers.

Slip – on. : – The Slip-on type flanges are attached by welding inside as well as outside. These flanges are of forged construction.

Socket Weld. : – The Socket Weld flanges are welded on one side only. These are used for small bore lines only.

Screwed. : – The Screwed-on flanges are used on pipelines where welding cannot be carried out.

Lap Joint. : – The Lap Joint flanges are used with stub ends. The stub ends are welded with pipes & flanges are kept loose over the same.

Welding Neck. : – The Welding neck flanges are attached by butt welding to the pipe. These are used mainly for critical services where the weld joints need radiographic inspection.

Blind. : – The Blind flanges are used to close the ends which need to be reopened.

Reducing. : – The reducing flanges are used to connect between larger and smaller sizes without using a reducer. In case of reducing flanges, the thickness of flange should be that of the higher diameter.

Integral. : – Integral flanges are those, which are cast along with the piping component or equipment.

No. Air pockets may form if concentric reducer is used at pump suction, which results in Cavitation and cause damage to Pump. To avoid this problem, Eccentric Reducer with flat side up (FSU) is used in Pump Suction.

Piping which is recognized as providing the most uniform application of heat to the process, as well as maintaining the most uniform processing temperatures where steam tracing is not capable of maintaining the temperature of fluid constant. Usually used for molten sulphur, Polymers service.

The thumb rule is that the minimum distance between adjacent butt welds is 1D. If not, it is never closer than 1-1/2″. This is supposedly to prevent the overlap of HAZe. Minimum spacing of circumferential welds between centerlines shall not be less than 4 times the pipe wall thickness or 25 mm whichever is greater.

Weld let is used for Butt weld branch connection where standard tee is not available due to size restrictions and the piping is of critical / high-pressure service. Sockolet is used for socket welding branch connection, which require reinforcing pad.